Can I sculpt a group of OBJs
Okay  a little trial and error,  and I've figured this out.  I need to export both  objects together from  the original program(not Blender),  keep  the vert order,  and poly groups intact. Import into  Blender, still keeping everything intact. 

Go  ahead and sculpt it as I normally would.  Save the file, and delete one half of the object,  and then export that(also  keeping vert  group order,  and poly groups).  Do  NOT save.  Close the file, open it back up  and delete the other side and export.  I now have the original two models,  right and left,  with  all internal  names intact.